

Big Seal is defined by its resident Australian and New Zealand fur seals, which turn this New South Wales pinnacle into one of the more animated dives on the coast. The site drops from 5 metres down to 40 metres, putting it firmly in deep diving territory, with visibility ranging from 10 to 40 metres depending on conditions. Current runs variable, so check before you descend. Grey nurse sharks and wobbegong sharks patrol the structure alongside Port Jackson sharks, while blue groper, kingfish, and the occasional dolphin or sea turtle pass through. Nudibranchs reward anyone who slows down and looks closely at the reef.
-36.26250, 150.21945
The clearest visibility and most reliable seal activity tend to coincide with the warmer months from September through April, so plan accordingly and bring a wetsuit with adequate thermal protection as the water runs cold. Always stay aware of boat traffic on the surface when ascending, and complete a safety stop well away from the anchor line if current is running.
The dive site is accessible via a 15-25 minute boat ride from Narooma. Several licensed tour operators, such as Underwater Safaris, offer trips departing from Narooma, often from Apex Park or Mill Bay Boat Ramp.
While grey nurse sharks are a highlight, divers should always maintain a safe distance and respect wildlife. Boat traffic is present due to the popularity of the island for diving and fishing charters.
Depth
5-40m
Visibility
10-30m
Skill Level
Intermediate
Entry
Boat
Boat required
Water Temp
16-24°C
Current
Strong
Typical Dive
60 min
Best Time
Jan, Feb, Mar, Apr, Sep, Oct, Nov, Dec
Big Seal in Narooma, New South Wales is renowned for encounters with Australian fur seals and New Zealand fur seals, which give the site its name. Divers regularly observe grey nurse sharks, wobbegong sharks, Port Jackson sharks, blue groper, dolphins and sea turtles. The diverse marine life makes this one of the most biodiverse cold-water dive sites on the Australian east coast.
Big Seal requires a minimum of Open Water certification, with Advanced Open Water recommended for exploring the deeper sections. The site descends from 5 metres to 40 metres, and intermediate diving skills are necessary to manage the depth range and boat diving procedures. Divers should be comfortable with multi-level profiles and boat entries.
Big Seal reaches a maximum depth of 40 metres, with the shallowest sections at 5 metres. The varied depth profile allows for multi-level diving, with seal interactions typically occurring in the mid-range depths. Divers can adjust their maximum depth based on certification level and experience.
The optimal months for diving Big Seal are January through April and September through December. Water temperatures range from 16°C to 24°C during these periods, with visibility between 10 and 40 metres. The site is best avoided during the colder winter months of May through August when conditions are less favourable.
Big Seal is accessible only by boat, with local charter operators departing from Narooma. Boat charters, guided tours and equipment rental are available through dive shops in the area. The site cannot be accessed from shore due to its offshore location.
Divers at Big Seal must be aware of several shark species including grey nurse sharks, wobbegongs and Port Jackson sharks, though these are generally non-aggressive. Cold water temperatures dropping to 16°C require appropriate thermal protection such as 7mm wetsuits or drysuits. Boat traffic in the area requires proper surface marker buoys and adherence to safe ascent procedures.
Big Seal is classified as an intermediate dive site and is not recommended for beginners. The depth range extending to 40 metres, boat diving requirements and open water conditions require solid fundamental skills. Newly certified Open Water divers should gain more experience before attempting this site or dive with a guide and stay in shallower zones.
There is no entry fee to dive Big Seal itself, but divers must pay for boat charter services from Narooma. Charter costs vary by operator and typically include two or three dives, though divers should confirm pricing directly with local dive shops. Equipment rental is available if needed at additional cost.
Yes, equipment rental is available at or near South Reef in Narooma. Contact local dive operators for specific gear availability and prices.
A 5mm wetsuit is recommended for diving at South Reef in Narooma. Water temperatures range from 16°C to 24°C.
South Reef in Narooma has depths ranging from 5 metres to 40 metres.
A typical dive at South Reef in Narooma lasts approximately 60 minutes. Actual dive time depends on depth, air consumption, and conditions.